HDD spinning up every 10min

Hi there,
since the Testing Update 2021-10-05, i notice one of my HDDs is spinning up now and then.
According to dmesg it seems to be pretty much exactly every 600s.
dmesg:

[ 6021.367611] ata9: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 6021.369207] ata9.00: configured for UDMA/133
[ 6021.369285] sd 8:0:0:0: [sda] Starting disk
[ 6047.567109] sd 8:0:0:0: [sda] Synchronizing SCSI cache
[ 6047.567373] sd 8:0:0:0: [sda] Stopping disk

Only happens for sda it seems, sdb is the exact same hdd model on the same controller.
I tried to catch if any process is trying to access the data there, but no luck so far with lsof and iotop.
I wasn’t able to find anything useful in that regard unfortunately, so i hope someone here has some idea on how to troubleshoot?

Check your /etc/fstab. Maybe you have something like

commit=600

in the line defining the mounting parameter for the device. This would sync the disc every 600 sec.

fstab: /dev/mapper/data /media/data ext4 defaults,nofail,x-systemd.device-timeout=30 02
crypttab: data UUID=xxx /crypto_keyfile.bin luks,timeout=90

Unless defaults have changed (and in that case the other hdd should show the same behaviour?) that doesn’t seem to be the cause, no :confused: